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SRTM-1 Support #124

Closed mt-from-sf-to-gh closed 2 years ago

mt-from-sf-to-gh commented 9 years ago

Feature Request from https://sourceforge.net/p/mytourbook/discussion/622811/thread/03a300d7/?limit=25#723f

This information is provided by Alfred Barten

Man könnte MT so erweitern, dass es aus den "Schichten" SRTM-3 /SRTM-1 auswählt, je nach Größe der Karte oder explizit über Bedienelemente.

MT verwendet momentan nur Format HGT für SRTM-3. USGS veröffentlicht drei Formate für SRTM-1, aber HGT ist nicht dabei. Eins der Formate ist DTED, das ist zwar ähnlich, aber man müsste es konvertieren oder eine neue Lesemethode schreiben. Zum Lesen von HGT für SRTM-1 wäre das aber auch der Fall.

Für den Download der USGS-Daten braucht man außerdem ein Login.

Reported by: wolfgang-ch

Original Ticket: mytourbook/feature-requests/122

mt-from-sf-to-gh commented 9 years ago

I obtained the HGT-files using a converter:

Original comment by: mikerhosoft

mt-from-sf-to-gh commented 9 years ago

In my own private application I use SRTM-1 for years. For elevation backgrounds it of course is more detailed, but for calculation of ascent sums of activities I use SRTM-3, not SRTM-1. SRTM-3 with a little smoothing gives the best results. I add ascents if they are 5m or more (configurable). SRTM-1 with the same smoothing results in accent sums which are much to big, e.g. for a ride with 1000m ascent it results in ~1700m. SRTM-3 has more "natural" smoothing which at first sounds contradictory but in practice is better for calculation of ascents. At least my experience! ;)

Original comment by: alfredbarten

mt-from-sf-to-gh commented 2 years ago

Original comment by: wolfgang-ch

mt-from-sf-to-gh commented 2 years ago

This feature is available in MT 22.2

Original comment by: wolfgang-ch

mt-from-sf-to-gh commented 2 years ago

You can switch between SRTM 1 and SRTM 3

SRTM 1

SRTM 3

Original comment by: wolfgang-ch

mt-from-sf-to-gh commented 2 years ago

Postponed the feature to switch between SRTM 1 + 3 to MT version after 22.2, there were too many code changes which could be dangerous for MT 22.2

https://github.com/mytourbook/mytourbook/issues/469

Original comment by: wolfgang-ch

mt-from-sf-to-gh commented 2 years ago

Noooooooooooooo 😭

Original comment by: mff73

mt-from-sf-to-gh commented 2 years ago

It's only the UI, to switch between SRTM 1 and SRTM3, which is postponed.

In the next version 22.2 (tomorrow), SRTM 1 is used/displayed when these data are available

Original comment by: wolfgang-ch

mt-from-sf-to-gh commented 2 years ago

Yeeeeeeeeees 😊 Thanks for all job done

Original comment by: mff73